S.C. Code Ann. § 58-27-1540

The Office of Regulatory Staff may, subject to the approval of the commission, establish a system of accounts to be kept by electrical utilities subject to its jurisdiction and may prescribe the manner in which the accounts must be kept. Every electrical utility must keep its books, papers, and records accurately and faithfully according to the system of accounts and all regulations and directions in relation thereto prescribed by the Office of Regulatory Staff.